burn process failed ripped with shrink, burn with nero

alright, i've got no idea what's goin on...I've been burning dvds just fine, about 20 of them in the past few days. They burn at 8x, no problem. No system changes that I'm aware of since then, but now every dvd I attempt to back up fails on me after about 3% into it...I tried defragging, and slowing by burn speed to 4x...DMA settings appear to be correct, only other thing I can think of is uninstalling and reinstalling Nero. Here is the most recent error message: